Official NHA Assessment

Race 5: BETWAY AVIATOR MIDDLE STAKES (For horses with nett rating of 101 and below)

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Line Horse
Crimson Princess
Reference for assessment
Exact Matches
0 / 10
Calculated = Official
Close Matches
1 / 10
Within 2 points
Significant Diffs
7 / 10
More than 5 points
Detailed Assessment
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Pos  Horse                Age  Weight  Fin  Lengths  WFA   Pre   Race Rating  New   Adj  
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1    Silent War           3    56.0    1    0.00     8.5   87    85           85    -2
2    Home Of The Brave    2    56.0    2    1.25     0.0   89    106          106   +17
3    Brave Viking         5    56.0    3    1.30     0.0   90    105          105   +15
4    Crimson Princess     4    60.0    4    3.50     6.0   99    99           99    +0
5    Perfect Witness      3    58.0    5    6.00     8.5   97    89           89    -8
6    Care Taker           4    50.0    6    7.25     6.0   88    78           78    -10
7    Now I Got You        5    60.0    7    11.50    0.0   95    110          110   +15
8    River Queraress      2    53.5    8    12.00    0.0   91    97           97    +6
9    Whispers Of War (AU  7    56.0    9    28.00    0.0   86    102          102   +16
99   Spin Doctor          3    56.0    99   0.00     8.5   -     85           85    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Silent War 87 91 85 +6 8.5 -
2 Home Of The Brave 89 97 106 -9 0.0 -
3 Brave Viking 90 72 105 -33 0.0 -
4 Crimson Princess Line 99 102 99 +3 6.0
5 Perfect Witness 97 105 89 +16 8.5 -
6 Care Taker 88 76 78 -2 6.0 -
7 Now I Got You 95 67 110 -43 0.0 -
8 River Queraress 91 88 97 -9 0.0 -
9 Whispers Of War (AUS) 86 64 102 -38 0.0 -
99 Spin Doctor - 90 85 +5 8.5 -
Assessment Methodology
Calculation Steps:
  1. Identify Line Horse - consistent performer used as reference
  2. Calculate WFA Allowance based on age, distance, and month
  3. Apply Drag Adjustment for beaten margin
  4. Calculate Actual Weight Performance:
    Weight - Drag - WFA
  5. Compare to Line Horse to determine race rating
  6. Apply special rules (maiden caps, layoff allowance)
Key Formulas:
  • Drag Effect: Varies by distance (see Benchmarks page)
  • 1 length ≈ 1kg at 1 mile (1600m)
  • WFA Scale: Based on Admiral Rous's 1855 table
  • Rating Points: 1kg = 2 rating points